Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
canh manh » lanh manh, canh tranh, cach mang
lang cong » dang cong, bang cong, hang cong
cong dan » cong san, cong tan, huong dan
manh va » hanh va, anh va, minh va
va lang » va nang, hoa lang
dan van » dang van, doan van, dao van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (nhieu tang)) - canh manh va lang cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (nhieu tang)) - canh manh va lang cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (nhieu tang)) - canh manh va lang cong dan van ban*.